All of these fish are pretty easy to get. Hardest will be the burbot. Last I checked www.liveaquaria.com still sold sturgeons...so just shop around. I was supposed to get in 10 paddlers this year, but coudlnt.
The burbots can be caught on lake superior or far north lakes here in WI and MN, thats about all I know about them...that and they taste awesome baked in butter and garlic.